Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."
______K+_______H2O-->____H2+______KOH

2K(s) + 2H2O(l) --> 2KOH(aq) + H2(g).....
Potassium can easily form unstable peroxides and superoxides that can explosively decompose when cutting into a sample of potassium even if it has been stored in kerosene.
Ionic equation
2K(s) + 2H2O(l) --> 2K+ + 2OH- + H2(g